Civil-date reference · 1991-12-16
December 16, 1991 BaZi Chart
Monday, December 16, 1991 maps to a reference three-pillar record of 辛未 · 庚子 · 庚申. The hour pillar remains unresolved until birth time and place are supplied.
Answer first: the reference Day Master for 1991-12-16 is Geng · Yang Metal, and the day pillar is Yang Metal Monkey (庚申). This is a date record, not a complete personal reading.
Deterministic record
1991-12-16 at a glance
| Gregorian date | Monday, December 16, 1991 |
|---|---|
| Lunar date | 农历辛未年十一月十一 · lunar month 十一月, day 十一 |
| Reference pillars | 辛未 · 庚子 · 庚申 (year · month · day) |
| Day Master | Geng · Yang Metal · heavenly stem 庚 |
| Solar-term position | Day 10 of Major Snow (大雪), beginning 1991-12-07 |
| Next solar term | Winter Solstice (冬至) · 1991-12-22 · 6 days away |
| Western constellation | Sagittarius (射手) |
Three coordinates, three jobs
What the reference pillars contain
Each stem-branch pair is a deterministic calendar coordinate. Its role changes by pillar position, so the three rows stay separate rather than collapsing into one personality label.
Yin Metal Goat · Xin Wei
The visible stem is Xin · Yin Metal; the branch is Wei · Goat · Earth. Its Na Yin is 路旁土, and the branch contains hidden stems 己 · 丁 · 乙. Open the full Jiazi record →
Yang Metal Rat · Geng Zi
The visible stem is Geng · Yang Metal; the branch is Zi · Rat · Water. Its Na Yin is 壁上土, and the branch contains hidden stem 癸. Open the full Jiazi record →
Yang Metal Monkey · Geng Shen
The visible stem is Geng · Yang Metal; the branch is Shen · Monkey · Metal. Its Na Yin is 石榴木, and the branch contains hidden stems 庚 · 壬 · 戊. Open the full Jiazi record →
Calculation boundary
What this date does not settle
The atlas uses a standard civil-date reference so dates can be compared consistently. A real birth happened at a place and an instant, not inside a URL slug.
- Hour pillar: requires birth time after historical timezone and true-solar-time correction.
- Day boundary: a late-night clock time can cross the adopted Zi-hour or solar-day boundary after correction.
- Solar-term boundary: an actual birth instant near a term transition can change the resolved year or month pillar.
- Interpretation: one date or one Jiazi pair does not determine career, relationships, wealth, health, or events.
Every date in December 1991
Resolve the fourth pillar
Calculate the actual birth chart
Add birth time and birthplace. Pillarwise then resolves historical timezone, longitude correction, equation of time, day-boundary risk, and the hour pillar before it generates a chart.
Questions about 1991-12-16
What is the BaZi day pillar for Monday, December 16, 1991?
In this civil-date reference, the day pillar is 庚申 (Yang Metal Monkey), cycle position 57 of 60. A personal chart must still resolve the birthplace, local clock time, and day boundary.
What is the Day Master for Monday, December 16, 1991?
The reference Day Master is 庚, Geng · Yang Metal. The Day Master is the heavenly stem of the resolved day pillar; it is not a complete personality result.
Can I calculate a complete BaZi chart from 1991-12-16 alone?
No. A complete Four Pillars chart requires birth time and birthplace. Historical timezone, longitude correction, equation of time, and hour or day boundaries can materially change the resolved chart.
Which solar term contains 1991-12-16?
1991-12-16 is day 10 of Major Snow (大雪) in this date reference. The next solar term is Winter Solstice (冬至) on 1991-12-22.